Padlock



.March 15, 1/932. c. BUEHNER PADLOCK Filed ot. 15, 1928 2 sheets-sheet 1new um C. BUEHNER March 15, 1932.

PADLOCK Filed OO.. 15, 1928 2 Sheets-Sheet 2 v were@ v f cnnisiinivBUEHNEELOF MILWAKE Patented Ylidar-15, 1932 i PiiiiLocK Y -applica/aum`fue@ oceani- 115, 192s."

The invention relates to improvementsin padlocks,` and has foritssobjectto'produc'e ai cheap and securelockof thejtype nainedand provide a.novel form of key therefoii-."

The main object of the'finvention is'topro* vide a lock ofthe characterdescribed,'so fcon-`y structed as to make lit practically impossible topick or open the shackle thereof byany other tool than the key providedfor it. f' Y Another objecty of vide a lock ofthecharacterdescribed,which may be easily'and cheaply manufacturedandassembled, simple inconstr-uction', and which will` be Vecient incarrying out the,purposesV `for which it isjdesigned. v `wl l 'y vWiththe 'foregoingand" other objects view, .which will appearaslthedescription: proceeds, the invention c'onsi'stsin certain novel andimproved features of construction, arrangements, and combination fof"partis, hereinafter more fully described, illustrated in thevaccompanying drawings, and partie# ularly'pointed out in the appendedclaims, it

' beingiinderstood that various'changes in the form, size, vand minordetails of thev structure may be kmade the invention.

vForthe nurpos'efof facilitating an under#- larcharacters "of referenceare employed to indicatey corresponding'.

` Fig. l is a view in-sectionoi embodiment-l or" the inventionshowingthe same inlocked` position; f i

Fi 3 isV a view similar. to Figl, looking in the direction of thearrows,L Y

the `invention is lto prof the reference' character `teri al suitablevfor without",departingr'from'the yspiritor'sacrificing any of-itheadvantages 'of kstanti ally parallel to the similar parts throughout theseveral Vfigures inthe draw# 1. r j j .after described. Y l1 ig. 2 is aView similar to Fig; 1, with the lockin unlocked position;U i

E, wisconsin? 1 Serial' No. i I

lis a. view in' perspective of ai bolt used in the," embodiment Aof theinvention Fig. Gis aiview in side elevation of ake'yrfor" said lock;Y l

Fi-gs. 7 and8 Vare views inperspective-'lo details;

' vvFi'glisv aview insectionof a niod-iiiedforni 'embodyingthezinfvention; I i

Fig. ,5 is a view in-perspective'of the cylin= l .de-rin vl'iicvh thekey passage is formed -Y 10510 ,of Figi .9 ;V

Figslll and' l2 are views details.; used in the modified 'form ofinyerif i key 'employed in the'modified-form of the.;y 1nvention'.'f""Y' il -VRe'fe'rring tothe drawings morel rspeciiic'ally perspecti'vienofl F g. 13 i'sfan elevationaliview ofthe-.lender ythe Vl, vdesignatesAllthev body ofi`l the padlock which-inay be substan;` -ti ally rectangularin'cross section'and ofafinaflY d v Vthe purpose, such 'a"s;"stee1,ybrass,` or-thelike. The `body` is preferably inade offaj'singlefblookandhas provided therein 'af-transverse bore 2,' eiitendii'ig'A from oneside of tliegbody to a point fadjacentthe other sidethereof, said bore2,"being'sub-v .top end ofthe body and lying in the upp'erpor'tion ofthebody.

longitudinal bore 3',

said body to a pointfnear the bottom thereof,

andlying adjacent one side thereof. A]I 'ecess' 4, adapted forthereception of :one end of a shackle or hasp is providedY adjacentjtheother' side 'offsaid-body, said lrecess' beingv f providedintlie'topefd'ge of said body; A second longitudinal bore "5, extendingfrom ythe bottom, edge of .the -body'to "establishconiv munication withthe" bore 2,'-isprovided in vsaid body, Asubstantially'in the centerthereof.

The bores v2 and 3, terminate in recessesfof re duced diameter for aiositionejdV in the transverseY,boi-e .gyfrrv purpose lto be hereinf isprovided iii said v e body, said bore 3, `extending fromthe top offslilding nioveinentthereon`,fisa 'suitable'meii-r beror bolt 6',provided witharecess 7 inf one end thereof, 4in which is adapted to'bereceived a coil spring 8, the other end of which spring is adapted to bereceived in the reduced end of the bore 2. Y

The free end of the bore-2, is closed by a screw plug 15, or the like,the head of said plug being countersunk in the side of said body, so asto provide a substantially smooth surface on the outside edge ofsaidbody, aiter the plug 15 rhas been disposed in place. Y

A shackle or hasp 9 is provided, said shackle liavinga longer end 10,and a shorter end 11. The longer end 10, is adaptedvfor sliding movementin the bore 3, said longer end 10, being provided with a number `otsuitable recesses in the wall thereof, one of said recesses 12, beingadapted for receiving the end of the bolt 6, when the latter is inlocking engagement with said shackle, as clearly shown in lFig. 1, ofthe drawings. f The shorter end 11, of the shackle is adapted to bereceived Iin the recess 4, when said-v shackle is in locked position.

The lowermost edge of the end 10, of the shackle is provided with arecess in which is adaptedto be positioned one end oi' a spiral spring13, the other end of which spring is received inthe lower reducedportionof the bore 3. The side wall of the longer end 10, of the shackle isprovided with a recess 14, disposed opposite to the bolt receivingrecess12, the end walls of said recess 14 are adapted to limittheslidingmovement of the shackle in the bore 3. As stated, the Jfree end'othe bore 2, is closed by a suitable screw plug 15, having the headthereof counter sunk, as shown at 16, in the drawings. The inner end ofsaid screw plug 15, is provided with a projection or lug 17, adapted tobe received vin the recess 14, for limiting the upv and down movement ofsaid shackle. The lower end 10, of the shackle may also beprovided withan annular groove, in which is adapted to be tted a washer`18, of rubberor the like, for assuring proper operation of the shackle in the bore 3.

1t will be noted that the spring 13, will normally force the vshackle 9to its upper or unlocked position, as shown in Fig. 2, and when theshackle is in that position, the bolt 6` must ot necessity be outotengagement with the `recess 12, or in the position shown in Fig. 2.The spring' 8, normally forces the bolt .to the ,right `as viewed inFigs. 1 vand 2. Y

It order, therefore to permit the spring 13, to force the shackle to itsupper oriinlocked position, the bolt 6, must be withdrawn from itsengagement with `the recess 12. To cause a withdrawal of the lbolt 6,the following novel and improved means are provided. A hollow cylinder20, open at `its lower Iend and having a suitably shaped projection orlug 21, integrally formed therewith at the upper face thereof, isprovided, said cylinder being adapted to be `received in theupperportion of the bore. The projection 21, isadapted ders 20 and to bereceived in a suitable recess 22, provided in the underside ot the bolt6, whereby, the rotation ot the cylinder 20, will cause a slidingmovement of the bolt 6. The following means are provided for rotatingsaid cylinder 20. A pair of longitudinal guiding slots 23, are providedin the cylinder 26, said slots extending from the lower open end of saidcylinder to a point adjacent the top thereof. A spring 23 is received insaid hollow cylinder, and the lower open end of said cylinder is closedby an annular head or member 24, said head 24, having a pair ofdiametrically opposed lugs 25 adapted to be received in said slots 23,:tor sliding up and down movement therein. The lower face .of the member24 is provided with a diametric slot or groove 26, for a purpose to bepresently described.

Adapted to be positioned in the lower portion of the bore 5, is a secondhollow cylinder 27, the upper bore of which lis adapted to abut againstthe lower tace of the member or head 21. VA suitable countersunk screw28, is provided for securely locking said cyliii- 27 in place in thebore 5. The top of said hollow cylinder 27, is closed by a suitablewasher 29, said washer having a diametric slotrSO, provided therein,andV when in assembled position said slot 30, is adapted to registerwith the slot or groove 26, provided'in the member or head 24, closingthe lower end oi' thecylinder 20. A washer 31, is employed for closingthe lower end of said cylinder 27 said washer being provided with avdiametric .slot 32, said slot being disposed at an angle to the slot30, in the upper washer 29.

A similar washer 33, provided with a diametric slot 311, is provided inthe 4cylinder 27 intermediate the top and bottom thereof, the slot Bil,being disposed at an angle to both the slots 30 and 32. It will thus benoted thataa substantially tortuous passage is provided between tlieoutside of the cylinder 27, and the groove or slot 26, provided in thehead vor member 24, closing the lower end of the .cylinder 20. lt willbe readily understood that by .the insertion of a proper `implement inthe groove 26., of Vthe member 2i, and rotating direction, the bolt 6,wil-l be withdrawn and the shackle 9, forced by the spring 13, to theopen position. f

The specially adapted key l() for insertion in the cylinder 27, 26,consists of a flat piece oi metal, or the like, eta thickness adapted topass through the slots 30, 82 and 311, and the end thereof being adaptedto be received in the groove 26. The said key l() is twisted to producethe necessary twists therein for adapting it to readily pass through.its tortuous mating passage formed in the cylinder 27. The body et thekey 'terminates in a handle'11, and the length of said bedy of the keyis suilicient to permit the ,same in a counterclockwise 1* for engagingiii the groove frio r2l, of the cylinder 20, may able ballbearing 43,for engagement with they Y Vwithdrawing the bolt 6. v

it 'toi vbeiin'sert-edl' in the tor-toons passage,

lforn'ied'infthe'l cylinder-27,1% as to have the Vfreeend 42,thereof,1received in thegroove 26. The key when insertedthrough the slot32, will traverse the tortuous passage and the end 42'thereof willengage inthe groove ..26, and when 'turned in the proper'directionwillcause -a rotation of the 'cylinder-20, which will in turn causeVa'sliding 'movement .of thebolt 6, thereby releasing the shackle 9.v

If desired, inthe top face ofthe projection be provided, aVv suitupperwall V'of the cut away1portion` 22,xof the bolt 6, for facilitating therotation of said cylinder 20. r f

It will be noted that the washers 29, 3l, and 33, provided/in thecylinder' 27, are spaced from each other, the angular relation of theslotsin said washers being such as toreadily permit the insertion ofthekey 40, without,- any impediment,A

By providing the spaced washers as shown, tampering with apiece of flatmetal is prevented, as a tool or implement of snliicient flexibility tobe introduced` through the tortuous passage formed bythe slots 32, 34,and 36,y will not retain its form' to permit it to rotate the cylinder 20, for

rlfhe key 40, is of correct twist and made of unyielding material andwhen inserted into its mating passage will transverse the same withoutimpediment until the end 42, thereof',

will be'received in thev groove 26., after'whichi it may be rotated ktocauseV a corresponding` y rotation of the cylinder20. A'washer 45, of

rubber or the like, is provided on the end 10 of` the shackle forpreventing dust'or vmoisture from' getting into'the. bore 3.

The body 50, is

1 51, and 52, is provided a bore 53, similar to J v from each other.

In the modified form shown 12 inclusive, the body 50, of the lock issimilar to the body 1, in the first modication;

provided with apair of longitudinal bores 51, and52, extendingcompletely thro ugh the body. Intermediate the bores the bore 5, the topof said bore 53, being-'in communication with a transverse bore 54, the

ends of which bore 54, communicate with theA longitudinal bores 5l and52. Disposed ywithin the transverse'bore 54, is a pairof cooperatingbolts and 56, said bolts'being provided with collars 57 and 58,'in theirinner ends,V

.erly rotating said implement, the said collars will be caused toseparate, thus moving 'f the ends of said bolts closer togetherfor linasuitable member..

' head` 66,

in rigszve ai;

wardly;` Thelfreefendiof said bore 154, may

bejclosedby as'uitablescrew plug 60,which 'f i may be countersunk in''the ofthe lock.' 'Adapted' for. reception. in kthe longitudinal side-vof the body bores 51 and52, arethe ends of a shackle or hasp V61,theinnerside` wallsrof said ends:

ofL the shackle'. being provided with suitable Y i notches 62, which areadapted toengage with the ends'ofthe bolts 55an`ol 56, forholding thesaidv shackle, locked position, as shownin Fig. 9v. 1

The following means are provided `for causing -afwithdrawal of the boltsin-order to permit the removal of the shackle from the body of the lock.Positioned inthe upper portion of the bore 53, isa hollow cylinder 63,open at its lower end, and closed at the top, and provided on itsVclosed end with a projection 64, and a pin or stud 65. .The projection64,'is adapted to be receivedfbetween the collarsl 57 and 58, and whenthe cylinder '63, is Arotated in the properdirection the said projection64,is adapted for spreadingsaid.

collars in order-to cause .an inward movement of the 'ends-of saidbolts,ther'ebywithdrawing the. same from the yengagement with thenotches 62,1'in the shackle 61. Suitable. longitudinal guide slots 15,1are provided in the sidesI of said..fcylinder, -andthe lower open'end-v. olf-said ycylinderV may ibe closed Yby or head966, whichisprovided with a-;diametrc groove` "67, and through which'eXt-ends arod 68, the ends of saidv rod; extending lbeyond `the -walls f of theguide'din the 'slots 15, provided inthe cylinder 63. Y'

' Aspiral .spring-69, is positioned inside' of lsaid hollowcylinder 63,for holding the' -headfv 66, against the top of a hollowlcylinder-Q, y

a manner y i .of ycylinder, 27, andais pro,- y y vided 'withga tortuouspassage Af rrnnthe out- Vsideth-ereofto the head 66. A suitable screwwhichr cylinder is constructed-in similar to that Vand are adapted tobeA received and 7l, is provided for securely locking said cyl-j inder70, in place-in thebody ofthe lock:

The operati-on of the modified form is tlie i' same as that ofthe first:form y endfof the key employed in this modification isbifurcated v tostraddle theY rodk l68' whenit insertedinto the groove, 67 ofthe head66.-

descrbed. The Y The construction of the lock affords means forpreventing thepicking or." opening ofjrfthe'V l i' vided for it. f

shackleby any'otherlt'ool than the key pron is feasible to Slightlyhangs the angular i relation between lthe slots in the washers,

thereby changing the twistof the key passage and by making acorrespondingchange in the twistjof the. key, a newpatternisgformedv Itlwill thus befpossible to have no great number f Yofkeys of thesainepattern made.l which will prove an additional',v .advantage securedby l13o .this form of lockaIld-key. v,

It is believed that my invention, its mode of construction, and many ofits advantages should be readily understood from the lforegoing withoutfurther description, and. should also be manifest that while preferredembodiments of theV invention have been shown and described forillustrative purposes, the structural details are nevertheless capableof wide variation within the purview of my invention, as defined in theappended claims.

What I claim and desire to secure by Letters Patent of the United Statesis:

l. A device of the character described, comprising a lock case havingtwin shackle sockets extending therethrough, a shackle having its legsreceived in said sockets, each of said shackle legs being provided witha locking notch, a pair of cooperating bolt sections slidably mounted insaid lock case adapted for engagement with said shackle legs for holdingthe same in locked position, a single spring means adapted for holdingsaid bolt sections inreXtended position, projections provided on saidbolt sections adapted for engagement with each other for preventing thedisassembly of said bolt sections, an velongated lng disposed betweensaid projections adapted for moving said projections away from eachother wherebylthe ends of said bolt sections will be brought out ofengagement with said notches, saidlng being carried by a cylinderdisposed in said lock case and adapted for rotarymovement there- 2. Apadlock comprisingr a lock case having twin shackle socketsextendingrtherethrough, a shackle having its leg portions re ceived insaid sockets, each of said leg portions being provided with a lockingnotch, sliding, cooperating bolt sections disposed in position forengagement with the notches in the shackle legs for locking thev shacklein the lock case, said bolt sections being provided adjacent one endwith a segmental projection'r the inner end of one of said projectionsbeing adapted for engagement with the inner end of the other of saidprojections when the sections are in assembled posiion, culprit portionsprovided. on each of said bolt sections intermediate the ends thereoffor receiving for sliding movement therein the projection of the otherof said bolt sections, a single spring means adapted for holding saidbolt sections in their extended position, an elongated lug disposedbetween the inner ends of said projections and adapted, when rotated, toforce said projections away from each other and against the action ofsaid spring means, said lug being carried by a cylinder disposed in saidlock case, and being adapted for rotary movement therein.

3. A padlock comprising a case having twin shackle sockets extendingtherethrough, a shackle having its leg portions received in saidsockets, each of saidleg portions being provided with a locking notch, apair of cooperating bolt sections disposed in position for engagementwith the notches in the leg portions, saidvbolt sections being providedwith segmental projections adjacent oneend thereof, Vcut ont portionsprovided oneach of said bolt 'sections intermediate the ends thereof forreceiving for therein the'projection of the other of said bolt sections,a single spring means received between said bolt sections and adaptedfor holding thesame in extended position, an elongated lug disposedbetween the adjacent ends of said projectionsl and adapted, whenrotated, for forcing said projections away from each other against theaction of said spring means, saidlug being carried by a cylinderdisposed in said lock case, said cylinder being adapted for rotarymovement therein.

.ln testimony whereof l aflix my signature.

CHRISTIAN BUEHNER.

sliding movementV

